Sunol Aggregates
MSHA mine ID 0401859 · Alameda County, CA
- Operator
- Mission Valley Rock, LLC
- Controller
- Martin Marietta Materials Inc
- Mine status
- Active since Sep 24, 1972
- Mine type
- Surface
- Primary commodity
- Construction Sand and Gravel
- Citations issued
- Jan 21, 2025 to Oct 6, 2026
Past 24 months at a glance
- Inspections
- 11
- Citations and orders
- 19
- Marked S&S by MSHA
- 1
- Assessed penalties
- $20,344
15 of 19 citations have an MSHA assessment so far, first proposed at $20,344. 0 are marked contested.
Citations by standard
The 30 CFR section MSHA cited, most cited first.
| Standard | Citations | Assessed |
|---|---|---|
| 56.14107(a) | 5 | $4,423 |
| 56.12032 | 3 | $12,640 |
| 56.12004 | 2 | $1,636 |
| 56.20003(a) | 2 | $1,098 |
| 56.11008 | 1 | $0 |
| 56.14109 | 1 | $0 |
| 56.14109(a) | 1 | $151 |
| 56.14112(a)(1) | 1 | $0 |
| 56.4201(a)(2) | 1 | $245 |
| 62.174(a) | 1 | $151 |
| 62.190(c)(2) | 1 | $0 |
Latest citations
| Issued | Assessed |
|---|---|
| Oct 6, 2026 No. 5162527 62.190(c)(2) | Not yet assessed |
| Oct 6, 2026 No. 5162526 56.14112(a)(1) | Not yet assessed |
| Oct 6, 2026 No. 5162525 56.14109 | Not yet assessed |
| Oct 5, 2026 No. 5162524 56.11008 | Not yet assessed |
| Apr 2, 2026 No. 9680969 62.174(a) | $151 Closed |
| Mar 31, 2026 No. 9680968 56.14109(a) | $151 Closed |
| Mar 31, 2026 No. 9680967 56.14107(a) | $151 Closed |
| Oct 22, 2025 No. 9680854 56.12004 | $818 Closed |
| Jun 2, 2025 No. 9680822 56.4201(a)(2) | $245 Closed |
| Jan 22, 2025 No. 9990856 56.14107(a) | $818 Closed |
| Jan 22, 2025 No. 9990855 56.12004 | $818 Closed |
| Jan 22, 2025 No. 9990854 56.14107(a) | $818 Closed |
| Jan 22, 2025 No. 9990853 56.14107(a) | $1,818 Closed |
| Jan 22, 2025 No. 9990852 56.12032 | $1,818 Closed |
| Jan 21, 2025 No. 9990851 56.14107(a) | $818 Closed |
| Jan 21, 2025 No. 9990850 56.12032 | $9,004 Closed |
| Jan 21, 2025 No. 9990849 56.20003(a) | $549 Closed |
| Jan 21, 2025 No. 9990848 56.20003(a) | $549 Closed |
| Jan 21, 2025 No. 9990847 56.12032 | $1,818 Closed |
Latest inspections
Regular Safety and Health Inspection
Event F04B43C
Oct 5, 2026 to Oct 8, 2026
Impoundment Spot Inspection
Event F0349FE
Jun 10, 2026
Compliance Follow-up Inspection
Event F027C9E
Apr 20, 2026
Regular Safety and Health Inspection
Event F027C9B
Mar 30, 2026 to Apr 6, 2026
Impoundment Spot Inspection
Event F01FD6A
Jan 28, 2026 to Jan 29, 2026
Regular Safety and Health Inspection
Event F029BA4
Oct 22, 2025 to Oct 28, 2025
Impoundment Spot Inspection
Event F01FD4E
Aug 21, 2025
Spot Inspection
Event F02491B
Jul 21, 2025 to Jul 22, 2025
Spot Inspection
Event F016957
Jul 21, 2025 to Jul 22, 2025
Regular Safety and Health Inspection
Event F0299C7
Jun 2, 2025 to Jun 4, 2025
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About this record
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